Re: [win32]g_iochannel and USB

[Manuel Ferrero <mferrero reer it>]

Igor Chetverovod wrote:

> > 2012/2/22, Manuel Ferrero<mferrero reer it>:
> > I'm trying to use a DLL for managing an USB connection.
> > In this DLL there is a function to open the USB channel wioth this
> > prototype:
> > int CP210x_Open(DWORD dwDevice, HANDLE* cyHandle);
> >
> > I thought I could link to that handle an iochannel, but I'm not able to
> > make it work.
> >
> > I wrote and compiled the following code:
> >
> > ---SNIP---
> > GIOChannel *USB_giochannel;
> > int USB_status;
> > HANDLE USB_handle;
> > DWORD USB_device;
> >
> > USB_device = 1;
> >
> > USB_status = CP210x_Open(USB_device,&USB_handle);
> > USB_giochannel = g_io_channel_win32_new_fd((int)USB_handle);
> > --PINS---
> >
> > but when I run it I get the message:
> > GLib-WARNING **: g_io_channel_win32_new_fd: 1740 isn't an open file
> > descriptor in the C library GLib uses.
> >
> >
> > What am I doing wrong?
> >
> > mingw32-gcc version 3.4.5
> > GTK+ version 2.24.8

> Hi Manuel,
> try to check this:
> http://old.nabble.com/g_io_channel_win32_new_fd()-td27764082.html
>
> Best regards,
> Igor

I read the thread, now I know I have to link against the right version 
of msvcrt.dll.
But I'm compiling with MinGW and according what Tor Lillqvist said in 
that thread it should work.
I don't specify any path in my IDE, I just choose the MinGW gcc as a 
compiler, so I assume I'm using the right DLL. How can I be sure?

Still, I can't manage to create a giochannel with the handle I get from 
the USB DLL CP210x_Open function.
--
Regards,
Manuel Ferrero
R&D department

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